|
| |
|
|
A299101
|
|
Indices of (probable) primes in A030221.
|
|
15
|
|
|
|
2, 3, 5, 6, 8, 9, 15, 18, 23, 53, 114, 194, 564, 575, 585, 2594, 3143, 4578, 4970, 9261, 11508, 13298, 30018, 54993, 198476
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
From a problem in A269254. For detailed theory, see [Hone].
a(25) > 2*10^5. - Robert Price, Jul 03 2020
|
|
|
LINKS
|
Table of n, a(n) for n=1..25.
Andrew N. W. Hone, et al., On a family of sequences related to Chebyshev polynomials, arXiv:1802.01793 [math.NT], 2018.
|
|
|
FORMULA
|
A299109(n) = A030221(a(n)). - R. J. Mathar, Jul 22 2022
|
|
|
MATHEMATICA
|
-1 + Position[Nest[Append[#, 5 #[[-1]] - #[[-2]] ] &, {1, 6}, 2600], _?PrimeQ][[All, 1]] (* Michael De Vlieger, Jul 03 2020 *)
|
|
|
CROSSREFS
|
Cf. A269254, A030221, A294099 (row 5).
Cf. A285992, A299107, A299109, A088165, A117522, A299100, A299101, A113501, A269253, A298675, A298677, A298878, A299045, A299071.
Sequence in context: A063756 A358291 A117522 * A335658 A294941 A028374
Adjacent sequences: A299098 A299099 A299100 * A299102 A299103 A299104
|
|
|
KEYWORD
|
nonn,hard,more
|
|
|
AUTHOR
|
L. Edson Jeffery, Bob Selcoe and Andrew Hone, Feb 02 2018
|
|
|
EXTENSIONS
|
a(24) from Robert Price, Jul 03 2020
|
|
|
STATUS
|
approved
|
| |
|
|
